Steps for stripping fiber optic pigtails

Fiber optic pigtails can be stripped using mechanical, thermal, or chemical methods, with specialized tools and safety precautions to avoid damaging the fiber.

Mechanical Stripping

Mechanical stripping is the most common method and involves using precision fiber strippers designed for specific fiber diameters and coatings. Standard telecommunication fibers typically have a 125 µm glass cladding with a 250 µm coating, while specialty fibers may have thinner coatings (e.g., 200 µm). Handheld strippers or automated systems remove the coating over a defined length (usually 30–40 mm) without nicking the glass.

Multi-layer cables require progressive stripping of each layer, including tight buffers (900 µm) and outer jackets, using tools like tri-hole strippers or flat drop cable slitters.

Thermal Stripping

Thermal strippers soften the polymer coating using controlled heat, making it easier to remove without mechanical force. Devices such as the Vytran FFS-2000 or FiberStrip 7030 are commonly used. Thermal stripping is effective for fibers with high-temperature coatings and reduces the risk of microfractures caused by mechanical blades.

Chemical Stripping

Chemical stripping involves dissolving the fiber coating using solvents or acids. For example, exposing the coating to 120°C sulfuric acid for a short period or applying gel-based paint strippers can soften the coating for removal. Care must be taken to protect the fiber tip and comply with local regulations, as some chemicals like dichloromethane are hazardous.

Best Practices

Safety: Always wear safety glasses and gloves to protect against fiber shards and improve grip. Tool Selection: Use strippers matched to the fiber's cladding and coating diameter. Color-coded blades and fiber guides help ensure consistent stripping.

Cleaning: After stripping, clean the bare fiber with lint-free wipes and high-purity alcohol to remove residues. Avoid Damage: Do not strip more than ~50 mm at a time to prevent weakening the fiber. Ensure the cut edge is straight and clean, avoiding jagged or angled cuts.

Specialty Fibers: Adjustable strippers or automated systems are recommended for non-standard diameters or high-precision applications. By following these methods and precautions, fiber optic pigtails can be safely and efficiently prepared for splicing or connectorization, ensuring reliable optical performance.